一种应用于低成本动中通天线的组合导航算法设计

Design of an Integrated Navigation Algorithm for Low-cost Satcom-On-The-Move Antennas

卫星/微机电惯性组合导航系统具有体积小、成本低等优点,可以为动中通天线提供位置、速度以及姿态信息,然而其无法依靠自身完成航向初始化,除此之外在静态场景下由于航向可观测性较差,面临航向发散的问题。结合动中通天线的特征,设计并开发了一种应用于动中通天线的组合导航算法。通过该算法得到的跑车测试结果北向、东向以及天向的位置信息精度分别为2.1 m、1.9 m及1.7 m,北向、东向以及天向的速度精度分别为0.05 m/s、0.05 m/s、0.04 m/s,横滚角、俯仰角、航向角精度依次为0.05°、0.08°、0.11°。长时间的摇摆台测试结果表明采用该方案场强跟踪信号强度均值为8.93 dBW,信号跟踪平稳。

The Global Navigation Satellite System/Micro-electro-mechanical Inertial Navigation System(GNSS/MINS)integrated navigation system has advantages such as small-sized and low-cost,which can provide position,velocity and attitude information for Satcom-On-The-Move antennas.However,the system cannot finish initialization by itself and the heading information may drift due to the poor observability in static environment.According to the characteristics of Satcom-On-The-Move antennas,an integrated navigation algorithm suitable for Satcom-On-The-Move antennas is designed.The van test results by the algorithm show that the northward,eastward and upward position accuracy is 2.1 m,1.9 m and 1.7 m,respectively,the northward,eastward and upward speed accuracy is 0.05 m/s,0.05 m/s and 0.04 m/s,respectively,and the accuracy of roll,pitch and yaw angle is 0.05°,0.08°,0.11°,respectively.The results of long-term test in shaking environment show that the average strength of signal tracking using this algorithm is 8.93 dBW,and the signal tracking is stable.